Gas burner



March 31. 1925.

' 1,53l,840 G, D. RADsHAw GAS BURNER Filed Sept. 8, 1921 FIG. 3

INVENTOR 9 v &W

Patented Marr. 31, 1925.

UNITED STATES 1 53134@ P-ATENT CE mam: n. BRADSHAW, or BEAVEB, PENNSYLVANIA.

GAS BURNEB.

Application med September 8, 1921( Serial No. 49,2`s2.

In Letters' Patent of'the'United StatesflNO.

1449522, granted' to me' August' 1915', there is set' forth and claimed a' gas burner which. comprises generally stated a' converg ing inletpassage, a diverging outlet passage, aii'bpnings in: and adjacent't'o the smaller cross'section of'` said burner, and-valves 'for controlling'the size of'said air openings, so that as the gas enters the'la'rgerend of the converging passage of the burner its velo'city is' inereased' as it passes theretlrough,. and as'it passes the air openings, by reason of the' 'fact that the' static head? at the air openings is less than zero or a partial vacuum, the air is drawn through the air openings, mixed with the' gas, and is 'discharged through the divergent outlet'passage in condition for proper combustion.

In that invention the body of the gasburner was made in one piece, so that there Was no way of varyng the throat area between the converging or diverging passages whereby such area could be made either larger or smaller, so as to enable a given quantity of gas per minute to be passed through the throat at several different velocities in order to vary the intimacy of mixture, and in this way to vary the length of the flame in the combustion chamber.

The object of the present invention -is to improve the above, as well as other, burners in this respect and to these ends my invention comprises the novel features hereinafter set forth and claimed.

In the accompanying drawing Fig. 1 is a vertical longitudnal sectional elevation of m improved burner in one of its forms; Fg. 2 is a like view showing the converging and diverging passages increased in size by the insertion of a thicker liner; and Fig. 3 is a front View of my improved burner.

While I have illustrated my invention in connection with a burner such as covered by said Patent No. 1,149,622, I do not wish to limit it in any senseto a burner of that construction.

My. improved burner i's' made up of two preferably symmetrieal halves'2. and'` 3, each half being provided With' registering fianges &through which pass the bolts 5 for securi ing the ha'lves together. The internal constructon of the burnerillustrated is the same asin said Letters Patent, there being the converging inlet' passage 6and the diverging outlet passage'` 7 with the airinlet's 8 at or near the jun'ction' or throat of'the converging and' diverging passages. These air nlets are controlled by suitable dampers 9 Where it is desired to reduce the throat area and-the size of the passages, thebolt's 5 are removed and a certain amount of' metal is removed from the fiangsc by planing or otherwise, whereuponthe halves are again Secured together. V i i The rea'r plate of the burnerhas the slots 12 formed' therein to receive the bolts 13 which c'onnect the inlet pipe ll to the burne`r The discharge opening 15 of the supply pipe I& should' prefrably he equal to or larger than the inlet ofthe converging passage 6 i whatever the size of the liner emplfoyed.

Thebolts 5 which connect the halves ofthe burner may be removed and a liner 17 of proper thickness is introduced between the flanges 4: and the bolts are then adjusted and Secured in place as shown in Fig. 2. In this way the size of the converging passages 6 and 7 are increased and likewise the throat area connecting such passages at the point where the air is admitted.

By my invention I provide a simple and' efficient means by which the burner may be quickly changed to enable a given quantity ot gas per minute to be passed through the throat at several different velocities in order to vary the intimacy of mixture, and in this way vary the length of the fiame in the com bustion chamber, so that the scope of the burner is greatly increased, and instead of having to install new burners under condi tions where greater or less velocity 'is desired, the same burner may be made to do.

What I claim is: p

1. A gas burner of the Venturi type divided longituclinally into sections, securing means for holding said parts together, a liner inserted between said sections, a plate at the rear of said burner having slots formed therein, a supply pipe having' flanges, and bolts passing through said flanges' and slots. s v

2. A gas burner of the Ventnri type divided longitudinally, and means for separating the divided ventnri for adjusting the throat area of said burner While maintaining the angnlar reiation of the Walls of said bur-ner snbstantially fixed relative to each other.

3. A gas burner of the Venturi type, having tWo parte, and means for relatively adjusting the part-s of the venturi to adjnst the threat areaof said burner While maintaining the anguiar relation of the walls of said burner substantially fixed relative to the longtndinai axis of the burner 4. A gas bm'ner of the Venturi type di:- vided longtudinally` to form separabe sections, securing means for holding said sections together, a removahle liner inserted between said sections, a slotted projecton on each of said sections, a flanged supply pipe cooperating With said projections, and securing means maintaining said supply pipe in cooperative relation to said projections and permitting relative adjustment therebetween.

v 5. In a gas burner, a mixing venturi, neans for feeding a combustion supporting ingredient to said venturi under pressure, said venturi having a laterally eX- tending opening terminating adjacent the v region of reduced 'pressure theren for the passage of a second combustion supporting mgredent m accordance With the pressure condltions in sad ventur, and means Whereby the inlet and outlet areas of said venturi.

may be simultaneously varied for varying the rato oi" both the iniet and outlet of said venturi to the throat.

6. A gas burner of the Venturi type comprising a mixing chamber having inlets leading toa point adjaccnt the region of minimum pressure therein, said chamber being divided longitudinally to form separable sections, and means for detachably secu'ing said sections together.

7. A gas bnrner of the Venturi'type comprising a miXing chamber having inlets leading to a point adjacent the region of minimum pressure therein, said chamber being divided longitudnally to form separable sections, and means for detachahly securing said sections together, each of said sections having projecting fianges for 'the reception of said securing means.

8. A gas bnrner of the Venturi type comprising a mixing chamber having inlets leading to a point adjacent the region` of maximum depression therein, said chaniber v being divided longtudinally to form separable sections, means for detachably securingsaid sections together,each of said sections having projectng flanges for the reception of said securing means, and spacing means detachably secured in position between said flanges. e

` In testimony Whereof I, the said GRANT D. BRADSHAW, have hereunto set my hand.

GRANT D. BRADSHAW, 

